Granted Patent
Utility
US 4,950,693 · App. 07/400,641
Porous copolymer resins
Inventor:
Zaev Sharaby
Patented Case
View Patent ↗
Granted: Aug 21, 1990
Filed: Aug 30, 1989
Inventor
Zaev Sharaby
Assignee (at issue)
B. F. Goodrich Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.